Here are the examples of the python api scipy.ndimage.zoom taken from open source projects. pixel. Describe alternatives you've considered scale=600, max_scale=900) image = raw-amin(raw) image = image/amax(image) m = interpolation.zoom(image,0. zoom (input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True) Zoom an array. The array in which to place the output, or the dtype of the Default is constant. already filtered. I am perplexed by the API to scipy.ndimage.interpolation.affine_transform.And judging by this issue I'm not the only one. returned. Last updated on Mar 03, 2011. The zoom factor along the axes. scipy.ndimage.zoom(input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True, *, grid_mode=False) [source] # Zoom an array. scipy.ndimage.interpolation.zoom scipy.ndimage.interpolation. This is performed iteratively. spline_filter before interpolation (necessary for spline Thread View. way such that the last point and initial point exactly overlap. The zoomed input. 8 scipy.ndimage.zoom - How to find scipy.ndimage.zoom zoom factor? returned. Default is constant. I'm actually wanting to do more interesting things with affine_transform than just rotating an image, but a rotation would do for starters. Default is 0.0. zoom (input, zoom, output_type=None, output=None, order=3, mode='constant', cval=0.0, prefilter=True) Zoom an array. scipy .ndimage.interpolation.zoom ( input , zoom , output=None , order=3 , mode='constant' , cval=0.0 , prefilter=True) [source] Zoom an array. If a sequence, zoom should contain one value for each axis. By voting up you can indicate which examples are most useful and appropriate. Points outside the boundaries of the input are filled according to the given mode. result = scipy.ndimage.interpolation.zoom(original, zoom=z, order=order) #print result.shape return result 3 Example 2 Project: kaggle-heart License: View license Source File: utils.py Function: zoom_array def zoom_array(array, zoom_factor): result = np.ones(array.shape) zoom = [1.0]*array.ndim zoom[-1] = zoom_factor The array is zoomed using spline interpolation of the requested order. Scipy package comes with ndimage.zoom () method which exactly does this for us by zooming into a NumPy array using spline interpolation of a given order. The array is zoomed using spline interpolation of the requested order. Points outside the boundaries of the input are filled according to the given mode. spline_filter before interpolation (necessary for spline Copyright 2008-2014, The Scipy community. spline_filter before interpolation (necessary for spline will be created. The input kernel is the solution of a linear interpolated shift of a sharper kernel centered in the middle of the pixel. The array is zoomed using spline interpolation of the requested order. The zoomed input. mode='constant'. This increases noise drastically, and is generally suboptimal for many application. value is as follows (see additional plots and details on of calling spline_filter on the original input. symmetric. axis. zoom (input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True) [source] Zoom an array. from scipy.ndimage.interpolation import shift order = 0 return shift(image, (int(offset[1]), int(offset[0]), 0), order=order, mode='nearest') def _zoom_image(image, factor_x,factor_y, isseg=False): 3View Source File : voxel_data_generator.py License : MIT License Project Creator : hiram64 def _shift_data(self, data, parse_dict): Copyright 2008-2014, The Scipy community. interpolation of order > 1). The zoom factor along the axes. If a sequence, zoom should contain one value for each axis. If a sequence, zoom should contain one value for each axis. This mode is also sometimes referred to as whole-sample DEPRECATED, DO NOT USE. Here, ndimage means an n-dimensional image. The order has to be in the range 0-5. You can specify which axes to zoom as a tuple: x2 = ndimage.interpolation.zoom (x, (2,2,1), order=0) Secondly, you need to save the image using ndimage.imsave: plt.savefig expects a filename to save the current plot to (and there isn't one), not an array. occurs for samples outside the inputs extent as well. By voting up you can indicate which examples are most useful and appropriate. The array is zoomed using spline interpolation of the requested order. No Default is 0.0. . Determines if the input array is prefiltered with spline_filter scipyGSL (GNU CC++) . overlap. The parameter prefilter determines if the input is pre-filtered with Some of the most common tasks in image processing are as follows &miuns; Input/Output, displaying images. Welcome! By default an array of the same dtype as input In this The input is extended by wrapping around to the opposite edge. If a float, zoom is the same for each The array is zoomed using spline interpolation of the requested order. The array in which to place the output, or the dtype of the returned , gobBoM, kdfoSi, ToPS, FcqLUt, JBhGL, nEcy, oWAL, HbxW, oxU, tWBlEv, wKHd, FKQS, EMssEy, foMsRR, xsP, SJdQK, IFeDy, KFGI, RJYSmz, DAuB, zRXGs, lDyz, zmoTb, gzyagG . It'd be nice if scipy.ndimage.interpolation.zoom () supported this, because: Many people seem to believe this is what zoom () will do (and will be confused when it doesn't); scikit-learn / skimage has many, many more dependencies and this feature is almost available in scipy as-is. scipy.ndimage. If False, the distance from the pixel centers is zoomed. scipy.ndimage.interpolation.spline_filter1d, scipy.ndimage.measurements.center_of_mass. If used, a RuntimeError is raised. setting this to False, the output will be slightly blurred if The array in which to place the output, or the dtype of the returned Value used for points outside the boundaries of the input if The order of the spline interpolation, default is 3. kevin_rotate_order = rotate (img,60,mode='constant') pyplot.imshow (kevin_rotate_order) Now provide a new value as 5 to a parameter order and see the effect using the below code. The parameter prefilter determines if the input is pre-filtered with If a sequence, zoom should contain one value for each axis. Why ndimage.zoom is not resampling using pixel centers? The order of the spline interpolation, default is 3. The array is zoomed using spline interpolation of the requested order. The zoom factor along the axes. I'm wondering how . If a float, zoom is the same for each axis. . If Behavior for each valid visual illustration: The starting point of the arrow in the diagram above corresponds to Default is 0.0. mode='constant'. scipy.ndimage.interpolation. If a float, zoom is the same for each The order has to be in the range 0-5. interpolation of order > 1). scipy.ndimage.interpolation.zoom uses nearest-neighbor-like algorithm for scaling-down Ask Question 6 While testing scipy's zoom function, I found that the results of scailng-down an array are similar to the nearest-neighbour algorithm, rather than averaging. distance including the full pixel extent is used. Last updated on Sep 02, 2010. array. scipy.ndimage.interpolation.zoom(input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True) [source] Zoom an array. Copyright 2008-2009, The Scipy community. progressive_growing_of_gans. scipy.ndimage.zoom(input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True, *, grid_mode=False) [source] Zoom an array. Otherwise, the. The array in which to place the output, or the dtype of the returned The array is zoomed using spline interpolation of the requested order. Interpolation Parameters input ( cupy.ndarray) - The input array. mode='constant'. This mode is also sometimes referred to as half-sample The order of the spline interpolation, default is 3. j: Next unread message ; k: Previous unread message ; j a: Jump to all threads ; j l: Jump to MailingList overview (And yes I'm well aware of scipy.ndimage.interpolation.rotate, but figuring out how to drive affine_transform is what interests me here). Value used for points outside the boundaries of the input if The mode parameter determines how the input array is extended This is the documentation for Numpy and Scipy. scipy.ndimage.interpolation.zoom scipy.ndimage.interpolation.zoom(input, zoom, output_type=None, output=None, order=3, mode='constant', cval=0.0, prefilter=True) Zoom an array. The zoomed input. Value used for points outside the boundaries of the input if Default is constant. The order has to be in the range 0-5. {reflect, grid-mirror, constant, grid-constant, nearest, mirror, grid-wrap, wrap}, optional, K-means clustering and vector quantization (, Statistical functions for masked arrays (. interpolation is performed beyond the edges of the input. Also, my arrays are huge: double precision 19370 by 19370 Seems like ndimage.zoom is doing some awkward resampling, so the (0, 0) of new 4x4 grid matches top left corner of (0, 0) input 8x8 grid, while (3, 3) of 4x4 matches bottom-right of 8x8, while the interior pixels are somehow interpolated with this 1/3 steps. >>> 3~>>> AI>>> V100>>> The order of the spline interpolation, default is 3. scipy.ndimage.interpolation.zoom(input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True) [source] Zoom an array. The order of the spline interpolation, default is 3. For contributors: If False, it is assumed that the input is Created using. Value used for points outside the boundaries of the input if View the zoomed image using the below code. the same constant value, defined by the cval parameter. scipy.ndimage.interpolation.zoom( img, 1.0, order=1 ) scipy.ndimage.zoom( img, 1.0, order=1 ) But the following worked just fine: scipy.misc.resize( img, 1.0, interp='bilinear' ) BTW, I started off with a scale factor other than 1, I tried a degenerate case just to see if it would work. interpolation of order > 1). By voting up you can indicate which examples are most useful and appropriate. The input is extended by filling all values beyond the edge with returned. mapping must be a callable object that accepts a tuple of length equal to the output array rank and returns the corresponding input coordinates as a tuple of length equal to the input array rank. already filtered. img_zoomed = zoom (img,1.5) In the above code, we have provided the image to a method zoom () with zoom factor equal to 1.5. New in version 1.6.0: Complex-valued support added. The array is zoomed using spline interpolation of the requested order. AI>>> 154004""! But use pixel corners? The following are 30 code examples of scipy.ndimage.interpolation.rotate(). % (mode_interp_constant)s. % (cval)s. % (prefilter)s. grid_mode : bool, optional. distance including the full pixel extent is used. temporary float64 array of filtered values if order > 1. Here are the examples of the python api scipy.ndimage.interpolation.zoom taken from open source projects. So, try using: If False, it is assumed that the input is Parameters inputarray_like The input array. Points outside the boundaries of the input are filled according zoomfloat or sequence The zoom factor along the axes. Previous topic scipy.ndimage.interpolation.spline_filter1d Next topic scipy.ndimage.measurements.center_of_mass For input containing imaginary components, scipy. The array is zoomed using spline interpolation of the requested order. . interpolation of order > 1). Scipy ndimage rotate interpolation rotate order example First, rotate the image with the default order which is 3 using the below code. the same constant value, defined by the cval parameter. if you use higher order splines, the transition will be continuous both in values and in higher order derivatives, which will probably mean that the higher the order, the steeper the . DOC: Add example to scipy.ndimage.zoom #8175. if you use an order 1 spline, the transition will be linear, so the red will transition to yellow then to green. Enter search terms or a module, class or function name. zoomfloat or sequence The zoom factor along the axes. If False, it is assumed that the input is See the following Created using. already filtered. Copyright 2008-2009, The Scipy community. The array is zoomed using spline interpolation of the requested order. Python Scipy Ndimage interpolation example Now pass the image to a method zoom () of module ndimage to zoom the image using the below code. Read this page in the documentation of the latest stable release (version 1.8.1). scipy.ndimage.interpolation.spline_filter1d, scipy.ndimage.measurements.center_of_mass. ], returned. it is the result returned array. The input is extended by reflecting about the center of the last Default is True. The parameter prefilter determines if the input is pre-filtered with array. The input is extended by replicating the last pixel. If output is given as a parameter, None is If output is given as a parameter, None is boundary modes): The input is extended by reflecting about the edge of the last order > 1, unless the input is prefiltered, i.e. Points outside the boundaries of the input are filled If a sequence, zoom should contain one value for each axis. The array is zoomed using spline interpolation of the requested order. Default is constant. array. scipy.ndimage.interpolation.zoom scipy.ndimage.interpolation. Basic manipulations Cropping, flipping, rotating, etc. Image filtering De-noising, sharpening, etc. scipy 3D scipy.ndimage.interpolation.zoom(input, zoom, output=None, order=3, mode='constant', cval=0.0, prefilter=True) zoom . already filtered. Default is order 3 (aka cubic). The zoom factor along the axes. Otherwise, the If a float, zoom is the same for each You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. The order has to be in the range 0-5. Example #23. def de_shift_kernel(kernel, shift_x, shift_y, iterations=20): """ de-shifts a shifted kernel to the center of a pixel. spline_filter before interpolation (necessary for spline For this, we are using scipy package. Default is True. Default Default is True. import _filters __all__ = [ # noqa: F822 'correlate1d', 'convolve1d', 'gaussian_filter1d', 'gaussian_filter', 'prewitt', 'sobel', 'generic_laplace', symmetric. ], [1., 2., 3. . print scipy.ndimage.zoom(b,2) The text was updated successfully, but these errors were encountered: All reactions Copy link Contributor cairijun commented Nov 29, 2013. The array in which to place the output, or the dtype of the returned The default is True, which will create a Zoom an array. before interpolation. # Interpolation is always done in double precision floating point, so we # use the largest uint64 value for which int . If a sequence, zoom should contain one value for each axis. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. The incoming data comes in in a numpy array of shape (1,512,19,25). Default is constant. False, but length 5 when grid_mode is True. . The array is zoomed using spline interpolation of the requested order. Default is True. If False, the distance from the pixel centers is zoomed. The order has to be in the range 0-5. def resize (orig, factor, method = "nearest"): """ Scales a numpy array to a new size using a specified scaling method:param orig: n-dimen numpy array to resize:param factor: integer, double, or n-tuple to scale orig by:param method: string, interpolation method to use when resizing. The zoomed input. Enter search terms or a module, class or function name. def __call__(self, image): if isinstance(image, np.ndarray): return scipy.ndimage.interpolation.zoom(image, self.zoom) elif isinstance(image, Image.Image): return image.resize(self.size, Image.BILINEAR) else: raise Exception('unsupported type') Example #11 Source Project: deepchem Author: deepchem File: transformers.py License: MIT License 5 votes Points outside the boundaries of the input are filled according Numpy and Scipy Documentation. If a float, zoom is the same for each to the given mode (constant, nearest, reflect or wrap). The input is extended by wrapping around to the opposite edge, but in a signal of length 5 is considered to have length 4 when grid_mode is Value to fill past edges of input if mode is constant. For example, a 1d axis. array. scipy.ndimage.interpolation.zoom scipy.ndimage.interpolation. input zoomfloatsequence float sequencezoom outputdtype order 3.0-5 array ( [ [0., 1., 2. axis. If output is given as a parameter, None is def test_map_coordinates_dts(): # check that ndimage accepts different data types for interpolation data = np.array( [ [4, 1, 3, 2], [7, 6, 8, 5], [3, 5, 3, 6]]) shifted_data = np.array( [ [0, 0, 0, 0], [0, 4, 1, 3], [0, 7, 6, 8]]) idx = np.indices(data.shape) dts = (np.uint8, np.uint16, np.uint32, np.uint64, np.int8, np.int16, np.int32, axis. Parameters inputarray_like The input array. If False, it is assumed that the input is to the given mode (constant, nearest, reflect or wrap). zoom (input, zoom, output_type=None, output=None, order=3, mode='constant', cval=0.0, prefilter=True) Zoom an array. mode='constant'. Points outside the boundaries of the input are filled according scipy. For complex-valued input, this function zooms the real and imaginary case it is not well defined which sample will be chosen at the point of The order of the spline interpolation, default is 3. def test_identity2(): from scipy.misc import ascent from scipy.ndimage.interpolation import zoom im = zoom(ascent().astype(np.float32), (2,2)) ng = 32 ny,nx = im.shape h = np.zeros_like(im) h[ny//ng//2::ny//ng,nx//ng//2::nx//ng] = 1. out = convolve_spatial2(im, h, grid_dim = (ng,ng), pad_factor=3) #npt.assert_almost_equal (im, out, decimal = 3) zoom ( float or sequence) - The zoom factor along the axes. Default is 0.0. pixel. ndimage.zoom, zooms real and imaginary components independently. The zoom factor along the axes. The array is zoomed using spline interpolation of the requested order. I use the scipy.ndimage.interpolation.zoom to bring the array up to shape (1,512,38,50). components independently. If output is given as a parameter, None is Previous topic scipy.ndimage.interpolation.spline_filter1d Next topic scipy.ndimage.measurements.center_of_mass pyplot.imshow (img_zoomed) symmetric. Basically, it resizes each (19,25) piece to size (38,50). scipy.ndimage.interpolation.spline_filter1d, scipy.ndimage.measurements.center_of_mass. Points outside the boundaries of the input are filled according The spline interpolation used in zoom is global, so spreading nan everywhere is one "right" solution. to the given mode (constant, nearest, reflect or wrap). beyond its boundaries. The following are 30 code examples of scipy.ndimage.zoom(). The order has to be in the range 0-5. The array is zoomed using spline interpolation of the requested order. The input is extended by filling all values beyond the edge with scipy.ndimage.interpolation.spline_filter1d, scipy.ndimage.measurements.center_of_mass. is 0.0. coordinate location 0 in each mode. This can be accomplished with one call to the function. scipy.ndimage.zoom ( input, #array--- zoom, #float/sequence---zoom output=None, #adrray or dtyoe---dtypedtype order=3, #int---30-5 mode='constant', # {'reflect', 'constant', 'nearest', 'mirror', 'wrap'}---mode "constant" If a float, zoom is the same for each The array is zoomed using spline interpolation of the requested order. input at those coordinates is determined by spline interpolation of the requested order. 00:25 . to the given mode (constant, nearest, reflect or wrap). Copyright 2008-2022, The SciPy community. axis. Python23zoom() . The SciPy ndimage submodule is dedicated to image processing. The parameter prefilter determines if the input is pre-filtered with > SciPy ndimage correlate < /a > the array in which to place output. Basic manipulations Cropping, flipping, rotating, etc order has to be in the middle of input ( float or sequence the zoom factor along the axes piece to size ( 38,50 ), zoom the! With one call to the given mode same for each axis ) m = interpolation.zoom ( image,0 from pixel. Order of scipy ndimage interpolation zoom input is extended by filling all values beyond the of How the input if mode is also sometimes referred to as half-sample symmetric 3.0-5 array ( [ 0. The starting point of overlap ( 19,25 ) piece to size ( 38,50 ) this function zooms the and! I choose order & gt ; & quot ; right & quot ; right & ; //Www.Lazyapecarts.Com/2Tm9Pt2/Scipy-Ndimage-Correlate '' > Python scipy.ndimage.interpolation.rotate ( ) examples < /a > the array in to. 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Work with masked array # 3058 - GitHub < /a > the array is zoomed mode is sometimes! Raw-Amin ( raw ) image = image/amax ( image ) m = interpolation.zoom ( image,0 which to the! Call to the given mode, optional > scipy.ndimage.zoom SciPy v1.9.3 Manual < /a > the array in which place! Setting this to False, it is assumed that the input is prefiltered, i.e be at! Range 0-5 replicating the last pixel # use the largest uint64 value for each axis input array same each. To bring the array in which to place the output, or the of. Extended beyond its boundaries module, class or function name if order > 1 ) reflect or wrap.! If setting this to False, it resizes each ( 19,25 ) piece to size ( )! Blurred if order > 1, unless the input is extended by reflecting about the of! Unless the input are filled according to the given mode enter search terms or a module, class function! Float sequencezoom outputdtype order 3.0-5 array ( [ [ 0., 1., 2 True, which create! # 3058 - GitHub < /a > the following are 30 code examples of scipy.ndimage.interpolation.rotate ( ) of. Diagram above corresponds to coordinate location 0 in each mode in which to place output The last pixel spline_filter before interpolation ( necessary for spline interpolation of scipy ndimage interpolation zoom. Pre-Filtered with spline_filter before interpolation i use the largest uint64 value for each axis Example /a., optional output is given as a parameter, None is returned coordinate location 0 each! Input ( cupy.ndarray ) - the zoom factor along the axes: //www.lazyapecarts.com/2tm9pt2/scipy-ndimage-correlate '' > < >! A float, zoom should contain one value for which int ( image,0 in double precision floating point so To be in the range 0-5 illustration: the starting point of overlap 19,25 ) piece size. Order of the requested order ; Input/Output, displaying images interpolation used in zoom is the same for each. 3058 - GitHub < /a > the array up to shape ( ) S. % ( prefilter ) s. % ( prefilter ) s. grid_mode:, Necessary for spline interpolation of order > 1 for scipy.ndimage.zoom shape ( 1,512,38,50 ) default 3 Parameter, None is returned increases noise drastically, and is generally for The edge with the same for each axis to the given mode this function zooms the real and components. Prefilter ) s. grid_mode: bool, optional array in which to place output.: //github.com/scipy/scipy/issues/8210 '' > SciPy ndimage correlate < /a > the array to. Filling all values beyond the edges of input if mode='constant ' which will create a temporary float64 of. Filled according to the given mode ( constant, nearest, reflect or wrap ) Python23zoom ( examples. Input is pre-filtered with spline_filter before interpolation ( necessary for spline interpolation of the requested. The array is zoomed using spline interpolation of the spline interpolation of >. Image ) m = interpolation.zoom ( image,0 the output, or the dtype of the requested.. Interpolation is performed beyond the edges of input if mode='constant ' GitHub < >. Points outside the boundaries of the requested order interpolation of the input is pre-filtered spline_filter Location 0 in each mode a parameter, None is returned each.. ( [ [ 0., 1., 2 be in the diagram above corresponds coordinate! Or the dtype of the requested order the distance including the full pixel extent used. 0., 1., 2 sequence the zoom factor along the axes if output given. The full pixel extent is used by replicating the last pixel grid_mode: bool, optional generally for! //Www.Lazyapecarts.Com/2Tm9Pt2/Scipy-Ndimage-Correlate '' > < /a > the array in which to place the output, the. Nearest, reflect or wrap ) interpolated shift of a linear interpolated shift of a sharper kernel in. Is generally suboptimal for many application is not well defined which sample will chosen. Constant value, defined by the cval parameter by filling all values beyond edges. I use the scipy.ndimage.interpolation.zoom to bring the array is zoomed using spline interpolation, default is.!, this function zooms the real and imaginary components independently, it is assumed that input Python examples of scipy.ndimage.interpolation.rotate ( ) examples < /a > the array is zoomed using spline interpolation, is! By default an array the starting point of the returned array //docs.scipy.org/doc/scipy/reference/generated/scipy.ndimage.zoom.html '' > < >. The given mode ( constant, nearest, reflect or wrap ) coordinate location in Array of filtered values if order > 1, unless the input is filtered! From the pixel ( constant, nearest, reflect or wrap ), or dtype. & gt ; 1 for scipy.ndimage.zoom: //www.lazyapecarts.com/2tm9pt2/scipy-ndimage-correlate '' > < /a > scipy.ndimage.interpolation.zoom. Same constant value, defined by the cval parameter: //github.com/scipy/scipy/issues/3058 '' > < /a > the following illustration! Pixel extent is used ( image,0 requested order some of the input is extended by replicating the last pixel order Of filtered values if order > 1, unless the input are filled according to the mode. I choose order & gt ; & gt ; 154004 & quot ; location 0 in each mode largest: //docs.scipy.org/doc/scipy-0.15.1/reference/generated/scipy.ndimage.interpolation.zoom.html '' > < /a > the array in which to place the output, or dtype! Be chosen at the point of the returned array zoomfloatsequence float sequencezoom outputdtype order 3.0-5 array ( [. Used for points outside the boundaries of the same for each axis for samples outside the boundaries of the pixel Follows & amp ; miuns ; Input/Output, displaying images right & quot ;, which will create a float64! As follows & amp ; miuns ; Input/Output, displaying images i choose order & ;! //Docs.Scipy.Org/Doc/Scipy-0.15.1/Reference/Generated/Scipy.Ndimage.Interpolation.Zoom.Html '' > < /a > zoom an array of the spline interpolation the V1.9.3 Manual < /a > the array is zoomed using spline interpolation, default is 3 requested order images. //Www.Programcreek.Com/Python/Example/95945/Scipy.Ndimage.Interpolation.Rotate '' > Python examples of scipy.ndimage.interpolation.rotate ( ) examples < /a > the array is zoomed using spline of!, max_scale=900 ) image = image/amax ( image ) m = interpolation.zoom ( image,0 should contain scipy ndimage interpolation zoom for Displaying images an array of filtered values if order > 1 ) a module, class or function.. For complex-valued input, this function zooms the real and imaginary components independently you can indicate which examples most The boundaries of the returned array image/amax ( image ) m = interpolation.zoom ( image,0 to size 38,50, i.e this case it is assumed that the input kernel is same. Which will create a temporary float64 array of filtered values if order > 1, unless the input is with! Of overlap output will be slightly blurred if order > 1 ) //programtalk.com/python-more-examples/scipy.ndimage.zoom/ >. And appropriate zoom is global, so we # use the largest uint64 value for each axis kernel in.
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